How cartridge front forks work | Offroad Engineered
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- Опубликовано: 26 июл 2024
- In this video, you can learn how an open-cartridge front fork works, its components and their functions, and how adjusting low-speed damping and high-speed damping works!
Hopefully, it will help you understand how your bike's forks work and how the adjustment of the clickers affects their performance.
Want to learn how to take full advantage of your suspensions adjustments? Check out our online courses:
stepstopodium.com/courses/fro...
Still have questions regarding this topic? Check out our personalised technical sessions:
www.stepstopodium.com/technic...
If you can, take a look at this Offroad Engineered episode first:
Ep.1 - • How dirt bike suspensi...
0:00 Intro
0:44 What's inside open-cartridge forks
2:18 The anatomy of a base valve
3:12 Damping rates
3:37 Low-speed damping
5:47 High-speed damping
9:12 Adjustments
10:50 End
Technical Touch is the official importer of KYB detailed Motorcycle Genuine parts and oils.
Get to know more at www.technical-touch.com/kyb-f...
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Cheers!
Music by:
Rick's Riffs - / @ricksriffs3156
Joakim Karud - / joakimkarud
Lakey Inspired - / @lakeyinspired
Video credits:
National Enduro Series: / nationalenduroseries
MXPTV: / wozwick
#FrontForks #OpenCartridge #HowItWorks 
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👏👏👏🥂🍾on another level here great explanations and graphics to follow up with all this in a fork. 😁👍Thanks for the class on front forks.
thank you so much for the kind words and thank you for watching! 😁
Your ability to transfer complex principles into fairly simple mind pictures is the BEST I’ve ever seen. Usually when someone is sharing knowledge of such value they want to make sure that you understand how smart they are by using terminology that if your not an engineer you only get a small amount of value from the time you spend watching. You my friend are an artist at conveying every aspect in a absorbable way!!! Thank You and GOD BLESS YOU!👍😁❤️
Thank you so much Raymond! I truly appreciate your comment! In my opinion, if you can't explain things simply, for how complex it is, it's because you don't fully understand the topic.
And you sir, just made my day! 💪💪
This is the best visualization I've seen so far!
Thank you so much! 😁💪
Wow. This is awesome! The quality of the explanations and animations are out of this world! Congrats!
thank you so much for such nice words, I really appreciate it! 😁💪💪
Subscribed. I'm a mechanic from the early '80's. I need to catch up. Gracias Amigo.
I've seen dozens of videos on shock absorbers and fork.
These are by far the best, I serve my shock absorbers and fork alone (and it works for me) and now I understand how many things I did not take into account.
Thank you so much for the knowledge you share and the amazing video.
I would love to see a video on the weight of the oils and how they affect the work of the shock absorbers and fork.
Thank you so much for the positive feedback Doron! It is much appreciated 🙌
Thankyou for explaining how forks work rather than just showing how to adjust them. You are a God send.
Thank you so much for the nice words Kenny 🙌
Just wanted to say thank you! Your animations are awesome they explain everything better than I’ve ever seen it! Thank you for allowing them to play a few times, helps things make sense.
Thank you for the comment!! I really appreciate it 💪I'm glad I helped you understand this, you just made my day 😄
Super quality explanation video. The best I have ever found so far.
What an amazing tutorial! Intelligently explained. Excellent animated illustrations. No hype, just great technical content explained in a neutral way with no sales angles! Wish there was more real content like this. Thank you.
Thank you so much for the nice comment Namdar! 🙌🙌🙌
Mate, your channel is just killing it; excellent information. Thanks, and subbed!
Thank you so much for watching and sharing that fanstastic feedback! It really makes up for all the work 💪💪💪🙌🙌
Never seen such an elaborate explanation of fork working principle thanks
Thank you!
I love this channel. ❤️ I've learned so much about how these things work I've guessed at for 30 years!
Thank you! Im glad I could help! 🙌💪
I had no idea the clickers on the top and bottom of the forks only affected low speed damping. Your videos are amazing.
Glad you like them! You have a bunch of videos related to suspensions to help you understand all these little details :)
Great explanation and animation! You have really demystified front shocks for me. Thanks!
I'm so glad to hear that Jeff!! Thank you for watching 🙌 you have a bunch of other videos related to suspensions and engines of this type 💪
Wow. Amazing explanation and great graphics. Thank you so much. Instantly subscribed... you have a great teaching style! Hoping for more.
Thank you so much for that! I really appreciate it 😃😃 I'm currently cooking the episode on how shocks work! Stay tuned 💪
Fantastic explanation! Thank you!
Having previously had really basic suspension with no compression and rebound adjustment I've never needed to get into this side of suspension. Well explained. Now I know what's everyone's on about regarding shims.
I'm glad I could help! 😄🙌
One of the best suspension videos period!
thank you so much! !! 😁😁💪💪💪
Great vid, I enjoy how well you explain things in a way (simple) that I can understand.
I would love to see a vid on setting front fork sag on an open cartridge fork too.
Thank you do much! Hopefully ill have the time to do that video!
Really appreciate the video. This truly helped me (noob) understand the dynamics of forks mechanics.
Thank you for watching! 😀 I'm glad it helped you! 💪 share it to help other noobs! 😆😅😂😂👌
My wrist thank you so much, I have low/high speed compression settings, and high/low speed settings on my fork, now I understand why when I adjust the low speed compression to minimum dampening, the high speed compression nearly never is "active" because it does the opposit of what is eplained at 9:58, again, you are amazing man .
Really glad I could help 🙌
Man, who needs school these days? This brings education to another level!
Thank you for that!! 🙌😄 don't forget that for me to bring you this content, I had to go to school 🤣
@@StepstoPodium I know, i did to but the teachers i had didn’t had any passion for it what so ever. I really had bad education but now with RUclips i became my own teacher 😎 thanks to guys like you explaining this in a clear and logical way !
I totally understand that! I'm glad I could help man 😃💪👌
Have been looking for this! Well done mate!
Thank you! Glad I could help 😊🙌
Outstanding video with the illustrations. Thanks a lot!
Thank you for watching 😄💪
MAN! Incredibly detailed explanation! Thank you. SUBSCRIBED!
Thank you!!! 😄🙌💪
Great Video, I'm looking forward to see the Video on Shims!
Thank you so much! I really appreciate it! 😊 it's coming soon!
By far the best dirt bike suspension tutorial in you tube. Excellent work on the video edit and animations. Very well explained by a true engineer to a public of dummies.
Keep up the good work mate !!!
Thank you so much Afonso, for such nice words! 😀😀💪💪These are the first of many, so there's still lot to be done 😆😆
At the same time he does not treat his viewers as dummies, like so many mc vendor videos!
🙌🙌🙏🙏💪💪
amazing tutorial ,best explanations,congratulations man .
thank you so much, I really appreciate it 😀💪💪
Best explanation I have seen. Thanks!
Thank you! 🙌
Top como sempre Steps!
Isto tem que se ver com muita calma e concentração. São muitas pequenas coisas, em sítios diferentes, a acontecer ao mesmo tempo!
Se fosse fácil todos já tinham percebido 😅😂 Espero que não tenhas problemas em perceber! Qualquer coisa manda daí que ajudo a que percebas 😊
awesome job man, very clear explanation
I'm glad I could help! 😄💪
Than you so much for the excellent explanation and for the graphic illustration
Thank you for watching! 😁💪
Thank you for this video!
Actually three! I really appreciate your interest in the videos 😊😊🙌💪💪
Incredible explanation!
Thank youuuu! 🙌🙏
Great video, great visualization! Tnx.
Thank you for watching 😃
Great explanation buddy. Thank you.
Thank you for watching! 🙌😊
Great video!
thank you! 😊
Wow great video!
💪💪💪💪🙌
Muchas gracias...muy buen video explicación y graficos
Gracias a ti por ver el video! Saludos
É o primeiro video que vejo teu, e quer a qualidade da explicação, quer a ilustração visual que a acompanha são excelentes! 💪
Não faço ideia dos moldes, nem do conteúdo, mas espero podermos fazer qualquer coisa juntos no futuro, é sempre um enorme prazer encontrar pessoas, especialmente portugueses, a fazer um trabalho tão bom de partilhar informação sobre motas fora-de-estrada com tão alta qualidade.
Muitos parabéns, grande grande trabalho Luís.
Zé - Instrutor chefe da BN-EnduroCamp
✌️🏍
Muito obrigado Zé! 😀💪
As portas estão sempre abertas para uma colaboração, é só vermos uma maneira de o fazer 😆
Um enorme abraço e espero ver-te por cá nos comentarios mais vezes 😊💪
Thank you. I learned a lot.
🙌
Thanks for the clue here ..Can't grasp all of this but I know much more than before I watched your video.
That's exactly what they are for! You just made my day! 🙌👌😊
Informações preciosas que são demonstradas gratuitamente. Parabéns!!! 👏👏👏🙏
Obrigado!!! Aproveita! 🙌😄
incredible video , from a 15k channel , instantly subbed
thank you so much for that! I really appreciate it 😁
Great animation and explanations
Thank you so much 😊💪
This was really good , i always wondered how shim stacks adjust fork feel 👌🏻
Glad I could help 😄🙌 you have a lot more videos related to suspensions and one just about shim stacks 💪
Best video on this subject EVER!! A-1-1. Thank you.
Thank you for watching! 🙌 What does A-1-1 mean? 😆
@@StepstoPodium This is an old classification method, that started before I was born. A more popular expression for the "best" is A1. Someone where I used to work, from the Quality Control Dept., would say A-1-1, meaning "the best".
Thank you so much Glen! 🙏🙏🙏
Great video Mr. engineer! The best explanation on RUclips! 👏
😍😍😁😁😁💪💪 thank you do much!
Já agora Nuno, o que achaste do vídeo? complicado ou acessível?
@@StepstoPodium na minha opinião, consegues explicar os processos de uma forma acessível a todos. Acho excelente os teus esquemas animados, ajuda imenso a visualizar as coisas. Acho que é um conteúdo de qualidade que não se encontra facilmente no RUclips, por isso acho que esta é a tua praia 🏖️💪 tenho noção que dá trabalho fazer estes vídeos, mas o resultado é muito bom sobretudo para quem quer aprender ou aprofundar conhecimentos sobre mecânico de motas. Tenho muita experiência profissional em educação/formação digital e multimédia, e se te digo que está bom é porque está mesmo bom! 😁 🇵🇹
Muito obrigado, fico mesmo contente! Não sabia que eras mas fico ainda mais satisfeito que para um profissional da área, é bem feito 😆💪💪
Great Video Thank You
Thank you for watching!
Parabéns pela excelente apresentação. A linguagem clara e as animações muito bem feitas tornam fascinante aquilo que à partida até poderia parecer entediante. Obrigado pela partilha.
Muito obrigado Mário! 😊 Fico super contente que seja claro e que ajude qualquer um a perceber um bocadinho melhor o nosso desporto 😁💪 grande abraço!
Amazing explanation
Thank you!!!
@@StepstoPodium I have a question, do you think the cartridge seal at the top of the open-cartridge type fork like my KYB46 FF should be completely sealed when it’s moving up with a rebound ? As my oil is leaking thru the seal back to main fork chamber and also thru the 2.5mm holes on the side of the cartridge cap where the seal for main 12.5mm rod is. Thank you.
I can't tell, but we can schedule a technical session and you can show me better the problem 💪
Go over to www.stepstopodium.com/technicalsessions 😊
Great video man lot of work
Thanks man! Yes it was, it took me around 150 hours from making the script to the animations 😅 But I think it's worth it! 💪
@@StepstoPodium hope you get the views man , i feel you . so much work goes in these videos and the strangest one done with the phone held half way out of the frame is the one that actually works, sad
RUclips works in mysterious ways 😕😂😂
I just hope people find out they can learn so much with these videos. One of the reasons why I started this segment was simply because there was no content whatsoever relates to this technical side of Enduro/MX. There are a lot of businesses that feed onto this lack of general knowledge.
thank you
Verry well done..... ; )
Thank you for watching 🙌💪
Mais um tuga de classe mundial! Vamos aumentar a barra mais ainda!
😃😃💪💪💪💪
This is great to know now that I need to do a rebuild of my dampers and change springs as they have become soft and spongy after 18 years of use
hmmm no way fork seals last 18 years , do they ?
of course not 😂 even if you don't use them, they dry up
Great!
Thank you!
Perfect
🙌🙌💪💪
suuuuuuuuch a good video!!
thaaaaaank you so much! 😁
@@StepstoPodium hah no problem. I'm really looking forward to your next video on tuning shim stacks.
there is still another one before that one, explaining the difference between open and closed cartridge forks, but I'll definitely get to that one!😆 It is taking a bit to skim the edges but it'll be really eye opening for the most interested in this matter! 😀
@@StepstoPodium I will wait patiently for it. I'm just now learning about rebuilding and tuning suspension, so any video is helpful.
SUPER 🤗
🙌🙌
Well I'm stunned. I've been riding sport bikes for more than a decade and I never learned any of this. How do the shims move like that? What are they made of? Also, does that means electronic adjustable is just a lil servo moving that needle in and out?
Now you do! Knowledge is power 😁
They simply bend. Since they are really thin, they easily bend but don't get permanently deformed.
Regarding the electronic adjustability, it can depend a lot from manufacturer, but yeah, it's a option having that!
Hi, i like to fit on a project bike the honda gp rs125 full cartridge and I finished it, but how can I fit also a compression set up on bottom? Any ideas? Thanks
I have no idea, sorry 😅
Hey! Can we use electromagnetic suspension on the front! !!
olá e parabéns por mais um bom video, reparo que a maioria dos comentários são fora do PT, penso que a trabalheira de falar em inglês e legendar em PT estejam a dar frutos fora de PT..Abraço e tudo de bom...
Muito obrigado! Quero que os vídeos possam alcançar o maior número de pessoas mas não tenciono de todo deixar os tugas de fora! 😁💪
Great video thank you. Pity you didn’t talk about the mid-speed compression valve. Can you explain it here? Or point to relevant literature? Thanks.
Thank you for watching!
I've got a video just about the mid speed valve 😉
@@StepstoPodium great! Can you point me to it please?
ruclips.net/video/lcNzyEyb1RE/видео.html
HI matey, a number of people want to make DIY high pressure compressors (4000psi/200 bar) for paintball guns- People are discussing the idea of using motorbike forks to do it - they look meaty enough. Do you know what pressures they are designed to handle? And do you have any suggestions or interest in looking into it... it would be a very popular video I reckon. I might try myself, but need to know the pressure tolerances of forks, plus I don't have a lathe and am worried about getting stuck 99% of the way through the process. With a proper air filter/dryer these could be used to fill diving bottle, too (reserve air source for filling paintball guns). Any help or ideas gratefully received!
any help for marzocchi magnum 45mm forks?
hey i've got a question at 4:38 - if the piston-rod comes down an compresses the oil in zone B, there are two possibilities for the oil to go out of this zone: 1. the compression base valve and 2. through the check valve of the piston. Both ways can be taken to reduce the pressure in zone B. What I don't understand is that if the oil goes through the piston check valve (2.) there is not much resistance to the oil because this valve is very big. So why should be there any kind of damping?
That is a great question! What happens is that only the volume in oil of the piston rod entering the cartridge is pushed through the base valve, the rest goes through the piston rod check valve (in this case, usually there is always a mid speed valve, but to simplify I just made a check valve)
You showed me how to take everything apart. Could you show how to take the top cap off.
Maybe it makes sense to schedule a technical session!
stepstopodium.com/technical-sessions/
Let me know what you think :)
The KTM 390 Adventure now offers both open cartridge's and closed cartridges' versions. If 'm a off roader doing mild trails and dirt roads, mountain paths, should I go with open or closed? f plan to upgrade suspensions n the future, which version is more easier to upgrade? Suggestions?
The open cartridge will have more comfort but closed cartridge will provide more stability. Depends on what you prefer!
@@StepstoPodium comfort or stability in offroad...hmmm...ok good one to think about....thanka
Muito bom como sempre.
Tenho uma dúvida, tenho uma ktm com uma suspensão normal na frente , será que vale apena gastar dinheiro em alterar para uma suspensão invertida, vou sentir muita diferença?
Não sei se gasto ou não visto que a mota é uma 125 e daqui a um anito ou dois quero outra mais forte, mas gostava de ter uma opinião
Se estás a pensar em mudar de mota daqui a pouco tempo talvez não faça sentido gastares numas suspensões. São componentes bastante caros! Quando tiveres uma mota mais definitiva, talvez aí faça mais sentido 😊
mas é apenas a minha opinião, como é óbvio 😉
Obrigado pela ajuda 😉
Sick video. So at 9:45 how exactly does the needle back itself out? Since the needle isn't directly attached to anything but is being pushed by a rod ( At least on my bike ) KYB 48mm. Does the needle get pushed back out by the oil pressure? Because mine is hard to move with my fingers when the fork is apart so I'm just curious how it works. Thank you !
Thank you Daniel! 😄 the needle is actually threaded onto the aluminium piece, but it for illustration purposes, I decided to sinplify the sketch 😂
@@StepstoPodium On my forks the needle gets pushed by a rod that gets pushed by the clickers. Does that make sense? Appreciate your time just trying to wrap my head around it. Thank you dude !
Sorry, forgot about the rebound/midspeed valve 🤦🏻♂️😂 yes, that one has a spring as well and the spring pushes inwards and the rod pushes outwards for example (it may depends from different technologies) 👌
@@StepstoPodium That's nuts !!! Thank you man !!!
Can we use twin telescopic suspension in front forks??
You probably can!
Hi - can somebody who knows how dampers work answer the following please? Trying to learn but I've watched the video 3 times and am confused. Surely damping cannot actually work as illustrated/described? I can see 2 fundamental problems:
1) Taking the compression stroke as an example: as forks compress the piston sweeps down the damper. As a result, chamber A gets bigger and chamber B smaller - BY EXACTLY THE SAME VOLUME. It really doesn't matter which orifice/s any resulting oil exchange occurs through, but the fact is that chamber A can ONLY exchange oil with chamber B - so A takes the FULL amount of oil (displaced during the stroke) from chamber B. The oil exchange of chambers A/B is therefore "complete" and "fully accounted for" (and the pressures in chambers A/B will be balanced). There can therefore be no possibility for any oil to additionally pass from B to C as described. If this were to actually happen, B would then be exhausting more oil than A was in-taking (which is physically impossible).
2) The 2nd issue is with the explanation of back-filling of chamber A during compression stroke. At 4:35 the author explains that during compression, the rebound check valve opens in order to fill chamber A. Why would it do that???? Oil would surely take the path of least resistance and simply flow up the "needle metered oil passageway" into chamber A instead?
Both of the same problems apply equally to the rebound stroke as well.
Any thoughts??? Thx.
I can see the telescopic fork suspension is just a strut where the coil spring is inside the shock absorber instead of the latter being inside the coil spring.
Any reason such an "inverted strut" can't be used on cars?
It all comes down to space. There's no room!
It makes me laugh when some of these complicated forks don't work as well as simple old-fashioned damper rod forks.
But you explained why cartridge forks are so harsh on small square edged bumps.
They can't tell the difference between a jump or a small square edged bump. This is where electronic suspension will be great.
Bring it on.
5:39 -- Look at the far right pic... It shows that thick washer on the upper side of the piston moving upwards to allow oil to flow upwards through the piston... Is that top nut on the compression valve suppose to be left loose in order for that thick flat washer to compress that spring and open up allowing oil flow?
--
The spring and washer I'm referring to are at 2:52 on the left side. These parts are on my compression valve ... The nut I am using here is clamped down and will not allow the thick washer to move any.
No, of course not! usually the nut bottom out. It's just an illustration. I had to simplify some details to remove the "noise". that way it's easier to focus on the most important bits :)
@@StepstoPodium THXS! Just for some angle I am missing on taking the harshness from my KYBs.
Hey i have problem with my suspension my fork rebound didnt work, i have turn my rebound clickers, but it feels like it has no end
What should i do ??
The best you can do is take it to a suspension workshop 😅
May I take this video, translate it into Russian and post on my channel with adding links on your original video and channel?🙃
So you show shims only on one side of the pistons, and check plate on the opposite. Don't some have shims on both sides of the piston? With a coil spring and check plate?
I have another episode going deeper about the shim part 😉
Wouldn't it had been better that for explanation purpose picture of one type of socks had been used? Or am I missing some thing here? Can some one please explain
Socks?
what about the function of the rebound spring ?
Which rebound spring?
Hi. Could you help? My rebound clicker does not rotate more than 3 clicks. But it should be up to 15 clicks. What should i check? Damping rod? Or maybe fork cap with a clicker?
how many click can you turn from fully closed to fully opened?
Try closing the clicker and then fully open. you should be able to count around 15/20 clicks depending on the fork
@@StepstoPodium I can turn 2, maybe 2 and a half clicks from fully open position. Manual to my 2015 v-strom 1000 says it should be 14 clicks. I tried a little harder but damaged clicker a little bit. So i can turn it 2 clicks ether way. But then it get harder and stuck =/
then you should disassemble the forks! something is possibly blocking the needle, like some grit or dirt 😅
@@StepstoPodium Yes, i think i would have to disassemble it anyway. I just want to consult a little bit because after i will find a problem i'm afraid i may need to order new parts and wait till they come, it may take up to one month =/ And i use bike every day.
that's a bummer 😅😕
Isnt compression on the top of the fork and rebound on the bottom?
It depends on the type of fork! Take a look at the next suspension video about open cartridge and closed cartridge forks 😉
My fork would not compress all the way I have the right oil level .i try to hit bumbs , I have 50mm travel I can't use ,like I bottomed out?
Couldn't understand, sorry. Bottomed out?
Sir MERI bike Sir mere pass CB shine hai sirf 20k chali. Abhi..jarase.gaddeme gayi to.aawaj.karti.mechanic bola.conal.set daalo.WO.bhi dala.phir.bhi jhatke.deti.Hai..
Kya.shockup.oil.change Karu''
Aur kitna.ml.dalna chahiye.plz.bataye
03:40
Vim pelo o prof Rui
What happened when fork oil level gose low
It can enter air imto the cartridge and at that point, it's the same as not having hidraulic damping at all!
He's going to explain you, not explain it to you. 😂😂😂 Good video though.
Мамкиным гонщикам хватило Ланкарры и первоисточник никто не пошёл смотреть?
Только искренне заинтересованные ребята идут смотреть первоисточник! обычно они находят драгоценные камни
@@StepstoPodium Ох не ожидал получить ответ, да ещё и по-русски! Спасибо ))
Это меньшее, что я мог бы сделать, если бы вы нашли время оставить комментарий! Спасибо, что заглянули на канал! :)
(извините, если есть ошибки, я использовал гугл переводчик!)
@@StepstoPodium Всё отлично. Ошибок нет. )) Буду смотреть ваши видео дальше. Спасибо.
Nice educational video, but you ruined it with the annoying background music. I couldn't take it for more than a minute. Why do people feel compelled to add crappy music while they are talking to the world? You are what we clicked on - not the music!
thank you! I feel ya! But with fact, people can't argue, and it's proven that for the large majority of people it's easier to watch a video if it has a background music... Trust me, it would save me a lot of time looking of soundtracks to put on the vids xD Cheers nonetheless!
@@StepstoPodium so I'm a minority & you're picking on me?
LOL JK!
I never heard about that research, but it makes sense because so many creators do it.
🤣🤣🤣🤣